FM-CW RADAR DEVICE - Mitsubishi Electric Corporation

Title:

FM-CW RADAR DEVICE

Document Type and Number:

Japanese Patent JP3613952

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To reduce the no-detection area of a target object caused by the DC and low frequency contained in the reception base band signal by applying the frequency analysis and relative distance/relative speed calculation corresponding to modulation bandwidths to the reception base band signal having different modulation bandwidths.
SOLUTION: Two kinds of modulation voltages controlling a voltage control oscillator 4 are stored in a modulation voltage memory section 1. The timing signal periodically switching the modulation voltages is outputted to a switch 20 by a timing controller 2 to transfer the modulation voltages in turn to a D/A converter 3. The high-frequency transmission signal having the oscillation frequency proportional to the modulation voltages is irradiated to a target object, the reflected wave is received, and the reception base band signal is outputted by a reception signal detection section 18. The reception base band signal having different modulation bandwidths is sent through an A/D converter 12, and the signal frequency is analyzed by a frequency analyzing means 13 via discrete Fourier transformation. The relative distance and speed are calculated by a distance/speed measuring means 14 based on the detected frequency spectrum to obtain the position and speed information of the target.

Inventors:

Takuya Suzuki

Application Number:

JP29841597A

Publication Date:

January 26, 2005

Filing Date:

October 30, 1997

Export Citation:

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